>> To use APF, make sure CONFIG:DUAL PB is set to APF. (This is the
>> default. “NOR” restores the original DUAL PB function.)
Given the value of both APF and Dual PB filters, the "menu dance"
to switch between the two is a very big drag. Please provide a
way to select either function (I'd suggest "Hold" and "Long Hold"
as used with Link/Diversity) without resorting to the CONFIG
menu.
73,
... Joe, W4TV
On 11/3/2010 4:05 PM, Wayne Burdick wrote:
> K3 beta-test firmware revision 4.17 (with DSP rev. 2.65) is now
> available. This release includes our new APF (audio peaking filter)
> for CW mode, which has been helping K3 field testers work "extreme"
> weak DX for the past several days.
>
> For voice modes, there's a "Fast Monitor" option (TX voice monitor
> without the processing delay). Also included is a much-improved TX
> Noise Gate.
>
> See detailed release notes below.
>
> Please send any questions to k3supp...@elecraft.com. For instructions
> on how to load beta firmware, see:
>
> http://www.elecraft.com/K3/k3_software.htm
>
> 73,
> Wayne
> N6KR
>
> * * *
>
> MCU 4.17 / DSP 2.65 / FPF 1.14, 11-2-2010
>
> NOTE: Be sure to install all firmware files for this release,
> including FPF 1.14. Otherwise your menu text will be incorrect.
>
> * APF (AUDIO PEAKING FILTER) ADDED: APF provides enhanced
> copy of weak signals in CW mode, and is especially useful when
> signals are at the noise level. The K3’s APF is patterned after
> the most successful analog APF implementations, and is equally
> effective in user tests. To use APF, make sure CONFIG:DUAL PB
> is set to APF. (This is the default. “NOR” restores the original DUAL PB
> function.) Then hold DUAL PB to turn APF on/off. A special DSP
> graphic display is used to show that APF is in effect. At the time
> APF is activated, the regular I.F. SHIFT setting, if any, is “frozen,”
> and SHIFT then controls the center pitch of the APF filter in 10-Hz
> steps. APF is independent for the main and sub receivers, as well
> as for presets I and II. Switching between these two presets is a
> convenient way of turning APF on/off quickly.
>
> * ADDED VOICE TX “FAST MONITOR”: Normally the voice
> monitor includes a ~20-ms delay, which is necessary to hear how your
> on-air signal will sound (with compression, etc.). If you prefer to not
> hear any delay in the voice monitor, set CONFIG:TX MON to FAST.
> Note: You’ll still hear the delayed and processed monitor if you
> adjust the MIC, CMP, TX EQ or TX GATE settings while transmitting.
>
> * TX NOISE GATE IMPROVEMENT: The Noise Gate/Downward
> Expander for voice modes has smoother response and much
> improved performance near the threshold.
>
> * NARROW AF FILTER IMPROVEMENT: Adjusting SHIFT and
> WIDTH when using very narrow DSP filters no longer causes
> ‘pop’ artifacts.
>
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